Calculating an initial Cr2O72-(aq) concentration of 1.0 x 10-3 M and an initial C2H5OH(aq) concentration of 0.500M?
1 Answer
(d) At 1.50 min,
(e) Use an initial
Explanation:
(c) Calculating concentration
The formula for absorbance
#color(blue)(bar(ul(|color(white)(a/a)A = epsiloncl color(white)(a/a)|)))" "#
where
It states that the absorbance is directly proportional to the concentration of the sample. Thus,
We can rearrange this formula to give
In your problem,
∴
(d) Determining the new setup
You know that
You want to keep
Thus, if you double the path length
Start with